题目

下列有关判断正确的是 A.用溴水检验CH2=CH—CHO中是否含有碳碳双键 B.1 mol HCHO发生银镜反应最多生成2 mol Ag C.对甲基苯甲醛()使酸性高锰酸钾溶液褪色，说明它含有醛基 D.能发生银镜反应的有机物不一定是醛类 答案：【答案】D 【解析】本题主要考查有机物的结构和性质。A中溴水具有氧化性，醛基也能使溴水褪色，干扰碳碳双键的检验，故A错；B中甲醛相当于有两个醛基，共生成4 mol Ag，故B错；C中甲基也能使酸性高锰酸钾溶液褪色，故C错；甲酸某酯、葡萄糖等也能发生银镜反应，但不属于醛类，故D正确。 Kate and Sally are very interested in movies. So they planned to (_1._) last Saturday. The famous film AVATAR was on at Jinying Theatre. They decided to meet at the bus stop at 6:30 p.m. and then (__2._) together to the theatre. When Kate got to the bus stop, it was already 6:26 p.m. But she couldn’t see Sally. Sally was late as usual. Fifteen minutes later, Sally came. When they got to the theatre in a hurry, the movie (_3._). They were told that all the tickets had been sold out. What a pity it was! Later they went shopping instead.